#include <57header.h>

void fun2(int num){
    printf("fun2 run \n");
}
int main(int argc,char*argv[])
{
    signal(2, fun2);


    char buf[1024] = {0};
    int res_num = read(STDIN_FILENO, buf, sizeof(buf));
    printf("res_num: %d \n", res_num);

    return 0;
}

